Thanks for all the tips...I am not having any problems now, don't know what I'm doing right! I think the problem may have been the backing. It was batik, and I rarely sew quilts that have a batik backing. Most of my customers just piece together whatever they have for the backing. I did notice that having a smaller needle helped with the batiks. I am nervous about moistening a quilt that is batik, due to possible color bleeding. Many of the local quilters don't prewash their fabrics and after seeing an incredible quilt with one dark purple batik bleeding onto its white neighbor, I swore I would prewash. I am kind of lazy about that, so now I'm swearing to prewash all batiks...LOL.
Anyway, thanks for the tips. I've had my "new" machine, an APQS Freedom since last summer and I keep learning about this machines little idiosynchrysies. It's amazing, each machine has its likes and dislikes and you have to play with them to learn its tricks.
Susan